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ms660 · 27th Jul 2019, 7:14 pm

Originally Posted by ms660:

Pin 1013 and pin 607 should have zero ohms (or near as damn it) between them when S1002 is switched to on and the mains connector is plugged into the machine so far as I can make out.

"I don't follow this. With S1002 open, the only connection between 1013 and 607 is the 2.2k R81. This is a new resistor, checked before putting in. With the mains out, I get 2.2k between 1013-607. With the mains in but the unit off, I get 0R. With the mains in and the unit on, I get 2.2k."

S1002 switched on means contacts 5&6 of S1002 make.

Zero ohms to me means something approaching 0 ohms, eg: a short circuit/perfect or near perfect continuity.

Lawrence.

27th Jul 2019, 7:14 pm	#49
ms660 Dekatron Join Date: Apr 2011 Location: Cornwall, UK. Posts: 13,454	Re: Uher CR240 Troubleshooting Best Practice Originally Posted by ms660: Pin 1013 and pin 607 should have zero ohms (or near as damn it) between them when S1002 is switched to on and the mains connector is plugged into the machine so far as I can make out. "I don't follow this. With S1002 open, the only connection between 1013 and 607 is the 2.2k R81. This is a new resistor, checked before putting in. With the mains out, I get 2.2k between 1013-607. With the mains in but the unit off, I get 0R. With the mains in and the unit on, I get 2.2k." S1002 switched on means contacts 5&6 of S1002 make. Zero ohms to me means something approaching 0 ohms, eg: a short circuit/perfect or near perfect continuity. Lawrence. Last edited by ms660; 27th Jul 2019 at 7:42 pm. Reason: Addition for clarity.